Each Year the cost of local services is spread across the value of taxable property. (Local budgets / assessed value of taxable property = mill levy)The statewide school mill levy is 20 mills ($20 for ever $1000 assessed value). County appraisers are responsible for uniformly and accurately valuing all property each year. That way, all citizens fairly share in supporting the cost of local services. Local services include police and fire protection, roads, parks, public, health services and schools.